GSTR-2B vs Purchase Register: ITC Reconciliation

Your purchase register may show the invoice, but does that automatically mean the ITC is ready to claim? Not necessarily.

For businesses registered under GST, Input Tax Credit is one of the most important areas of monthly compliance. A company may have correctly recorded a purchase in its books, received the invoice and even paid the supplier, yet the corresponding transaction may not appear correctly in GSTR-2B.

This is why GSTR-2B vs Purchase Register reconciliation has become an essential part of GST compliance.

GSTR-2B is an auto-drafted, static ITC statement generated from information furnished by suppliers and other relevant sources. GSTN advises taxpayers to reconcile GSTR-2B with their own records and books of accounts and ensure that ITC is not claimed twice, required reversals are made and applicable reverse-charge tax is paid.

For businesses in Delhi, Noida, Gurugram, Ghaziabad and other parts of NCR, monthly reconciliation can help identify supplier errors, missing invoices, duplicate entries and other discrepancies before they affect GST returns or lead to compliance issues.

What Is GSTR-2B?

GSTR-2B is a read-only, static statement of Input Tax Credit available to a registered taxpayer.

It is generated based on information furnished through sources such as:

• Supplier's GSTR-1/1A
• GSTR-5
• GSTR-6 filed by an Input Service Distributor
• Import data received through the relevant system
• Other information incorporated into the GSTR-2B framework

GSTN states that GSTR-2B indicates ITC availability against documents reported by suppliers and ISDs and should be used to help determine the appropriate ITC in GSTR-3B.

Importantly, GSTR-2B is not a return that the recipient files. It is an auto-drafted statement available for viewing and downloading on the GST portal.

What Is a Purchase Register?

A purchase register is an accounting record maintained by a business containing details of purchases and inward supplies recorded during a particular period.

Depending on the accounting system, it may contain:

• Supplier GSTIN
• Supplier name
• Invoice number
• Invoice date
• Purchase value
• Taxable value
• IGST
• CGST
• SGST/UTGST
• Cess
• Expense or asset category
• ITC classification
• Payment status
• Credit notes and debit notes

The purchase register represents what the business has recorded in its books.

GSTR-2B represents information available on the GST system based on filings and other relevant data.

The two are therefore not automatically identical.

That difference is exactly why reconciliation is required.

Why Should You Reconcile GSTR-2B With the Purchase Register?

A business may have hundreds or thousands of purchase invoices every month.

Without reconciliation, several issues can remain unnoticed.

For example:

• A supplier may not have reported an invoice.
• The supplier may have reported it under an incorrect GSTIN.
• The invoice number may have been entered incorrectly.
• Taxable value may differ.
• GST amount may differ.
• A credit note may not have been accounted for correctly.
• The same invoice may have been recorded twice.
• An invoice may appear in GSTR-2B but not exist in the purchase register.
• ITC may be marked as unavailable for a specific reason.
• A transaction may require separate RCM treatment.

GSTN specifically advises taxpayers to reconcile GSTR-2B with their records and books and ensure that credit is not availed twice.

When Is GSTR-2B Generated?

For monthly recipients, GSTR-2B is generated on the 14th day of the succeeding month. GSTN explains that the statement includes documents furnished by suppliers and other relevant parties within the applicable cut-off period.

For example, the GSTR-2B for a particular month becomes available according to the GSTN generation schedule, allowing the taxpayer to review the ITC information before completing the relevant compliance process.

Businesses should therefore build GSTR-2B reconciliation into their monthly GST calendar rather than waiting until year-end.

GSTR-2B vs Purchase Register: What Exactly Should Be Matched?

A basic reconciliation should compare invoice-level information.

The most important fields include:

• GSTIN of supplier
• Invoice number
• Invoice date
• Taxable value
• IGST
• CGST
• SGST/UTGST
• Cess, where applicable
• Credit/debit note details
• ITC availability
• Reverse-charge classification

A simple total-level comparison is not enough.

For example, if the purchase register shows ₹10 lakh of taxable purchases and GSTR-2B also shows ₹10 lakh, that does not prove that every invoice matches.

Two invoices could be missing while another invoice has been duplicated or incorrectly reported.

Invoice-level reconciliation is therefore much more useful than simply comparing monthly totals.

The Four Main GSTR-2B Matching Results

GSTN's current matching tool categorizes reconciliation results into different buckets, including:

• Exact Match
• Partial Match
• Probable Match
• Mismatch

The mismatch category can further include records that are unmatched, appear in GSTR-2B but not in the purchase register, or appear in the purchase register but not in GSTR-2B.

Understanding these categories helps businesses decide what action is required.

1. Exact Match

An exact match generally means the relevant matching parameters agree between GSTR-2B and the purchase register.

For example:

Supplier GSTIN: Same
Invoice number: Same
Invoice date: Same
Taxable value: Same
Tax amount: Same

These transactions can move to the next stage of ITC eligibility review.

However, an exact match does not automatically mean the ITC is legally claimable in every circumstance. Other GST provisions and restrictions still need to be considered.

GSTN itself cautions that GSTR-2B may not capture every possible reason why ITC could be unavailable, so taxpayers must exercise caution and self-assess eligibility.

2. Partial Match

A partial match can occur when the invoice appears to be the same transaction but certain details differ.

For example:

Supplier GSTIN: Same
Invoice number: Same
Invoice date: Slight difference
Taxable value: Same

This should not immediately be treated as a missing invoice.

The accounting team should compare the original invoice with the supplier's reported data and determine whether the difference is simply a data-entry issue or requires supplier correction.

3. Probable Match

A probable match may indicate that the system has identified records that are likely to relate to the same transaction but do not satisfy all matching parameters.

For example, an invoice number may contain a formatting variation:

Purchase Register: INV/2026/145
GSTR-2B: INV2026145

The team should manually verify the original invoice before deciding the appropriate treatment.

4. Mismatch

A mismatch requires investigation.

It may involve:

• Two or more parameters not matching
• Invoice available only in GSTR-2B
• Invoice available only in the purchase register
• Significant value difference
• Incorrect GSTIN
• Incorrect invoice information

GSTN's matching tool specifically identifies categories such as “In GSTR-2B not in PR” and “In PR not in GSTR-2B.”

Invoice in Purchase Register but Not in GSTR-2B

This is one of the most common situations.

Suppose your purchase register contains an invoice:

Supplier: ABC Technologies
GSTIN: 07XXXXXXXXXX1Z5
Invoice: ABC/125/26
Taxable Value: ₹1,00,000
GST: ₹18,000

But the invoice does not appear in GSTR-2B.

The business should investigate before treating the amount as available ITC.

Possible reasons include:

• Supplier has not yet filed the relevant document.
• Supplier reported it after the applicable cut-off.
• Supplier used an incorrect recipient GSTIN.
• Invoice details were incorrectly reported.
• The document was amended.
• The transaction belongs to a different reporting period.

GSTR-2B is static for a tax period, and taxpayers cannot manually add or modify documents in it. GSTN specifically states that recipients cannot add documents or make changes to GSTR-2B themselves.

The business should therefore identify the cause instead of manually treating the missing document as if it were reflected in GSTR-2B.

Invoice in GSTR-2B but Not in Purchase Register

The opposite situation also requires attention.

Suppose GSTR-2B contains an invoice for ₹75,000 from a supplier, but the accounting system has no corresponding purchase entry.

Possible explanations could include:

• Purchase was recorded under another invoice number.
• Invoice was received but not booked.
• The transaction was booked in another accounting period.
• Supplier made an incorrect filing.
• The invoice belongs to another GST registration of the business.
• Duplicate or erroneous reporting occurred.

The business should investigate the underlying document before claiming the ITC.

GSTR-2B should not be treated as a substitute for the business's own books and supporting documents.

Difference in Invoice Number

Invoice-number mismatch is common because businesses and suppliers may use different formats.

For example:

Purchase Register: INV-00125/26
GSTR-2B: INV00125/26

A software matching tool may classify such records differently depending on its matching parameters.

The accounting team should establish whether both records refer to the same original tax invoice.

Do not create duplicate entries simply because the invoice numbers appear different.

Difference in Taxable Value

Suppose the purchase register shows:

Taxable value: ₹2,00,000
GST: ₹36,000

But GSTR-2B shows:

Taxable value: ₹1,90,000
GST: ₹34,200

This is not a simple formatting difference.

The original invoice should be reviewed, along with any credit note, debit note or amendment filed by the supplier.

The business should determine which figure represents the correct transaction and whether the supplier needs to make a correction.

Difference in GST Amount

Even when the invoice number and taxable value match, the tax amount may differ.

Possible causes include:

• Incorrect tax rate reported
• Incorrect tax amount
• Taxable-value difference
• Credit/debit note
• Amendment
• Accounting error

Such differences should be resolved before finalising the ITC claim.

How to Reconcile GSTR-2B and Purchase Register Step by Step ?

Step 1: Download GSTR-2B

Log into the GST portal and download the GSTR-2B for the relevant period.

GSTN allows GSTR-2B to be viewed and downloaded in formats including Excel and JSON.

Step 2: Export the Purchase Register

Extract the purchase register from the accounting or ERP system.

Make sure the report covers the same tax period and contains sufficient invoice-level information.

Step 3: Standardise the Data

Before matching, clean the data.

Check:

• GSTIN format
• Invoice number formatting
• Invoice date format
• Taxable value
• Tax amounts
• Credit/debit note classification

This is important because small formatting differences can create unnecessary mismatches.

Step 4: Match Supplier GSTIN

GSTIN should be one of the first matching parameters.

If the GSTIN does not match, investigate before considering the transaction reconciled.

Step 5: Match Invoice Number

Compare invoice numbers after applying consistent formatting.

Do not remove meaningful characters blindly because some invoice numbers may legitimately contain prefixes or other identifiers.

Step 6: Match Invoice Date

Compare invoice dates and investigate material differences.

Step 7: Match Taxable Value and Tax

Compare taxable value and individual tax components.

Where relevant, check:

• IGST
• CGST
• SGST/UTGST
• Cess

Step 8: Classify the Result

Every transaction can then be placed into a working category such as:

• Exact match
• Partial match
• Probable match
• Mismatch
• GSTR-2B only
• Purchase register only
• Duplicate
• Under investigation

Step 9: Determine ITC Eligibility

Matching is only the beginning.

The business should separately determine whether the ITC is legally available.

GSTN explains that GSTR-2B's “ITC not available” section covers specified scenarios, including certain Section 16(4) cases and certain place-of-supply situations, while other legal restrictions may need separate self-assessment by the taxpayer.

Step 10: Reconcile With GSTR-3B

Finally, compare the reconciled ITC with the amount actually claimed in GSTR-3B.

The GST portal currently auto-populates specified ITC fields in GSTR-3B based on GSTR-2B, but the values remain subject to taxpayer review and appropriate modification where required.

A Practical GSTR-2B Reconciliation Example

Consider a Delhi-based trading company with the following September purchase records:

At first glance, there is a significant difference.

The business should not simply claim the entire ITC appearing in its purchase register.

Instead, it should identify:

• Which invoices are missing from GSTR-2B?
• Which invoices have value differences?
• Are any credit notes involved?
• Did any supplier use the wrong GSTIN?
• Are any transactions duplicates?
• Is any ITC restricted or unavailable?
• Are there timing differences?

Suppose ₹80,000 of the difference relates to invoices not yet reported by suppliers and ₹40,000 relates to accounting errors.

The reconciliation report should document these separately rather than showing one unexplained ₹1.2 lakh difference.

How GSTR-2B Reconciliation Affects GSTR-3B ?

GSTR-2B is closely connected with the ITC information used while preparing GSTR-3B.

GSTN states that specified ITC fields in GSTR-3B are auto-populated from GSTR-2B.

However, businesses should not simply accept system-generated numbers without review.

The taxpayer remains responsible for reporting the correct figures.

The reconciliation should therefore follow:

Purchase Register → GSTR-2B → ITC Eligibility → GSTR-3B

Not:

GSTR-2B → Automatically Claim Everything

What About DRC-01C?

GSTN has introduced a return-compliance mechanism for certain differences between ITC available according to GSTR-2B and ITC claimed in GSTR-3B.

Where the difference exceeds the predefined limit, an intimation may be issued in Form GST DRC-01C. The taxpayer is required to provide a response in Part B and reconcile the difference. GSTN states that failure to file the required response can affect the filing of the subsequent GSTR-1/IFF.

This makes it even more important to maintain a proper reconciliation trail.

A business should be able to explain why its claimed ITC differs from the ITC reflected in GSTR-2B.

Common Mistakes During GSTR-2B Reconciliation

Comparing Only Total ITC

A total-value comparison can hide invoice-level errors.

Claiming ITC Solely Because It Appears in GSTR-2B

GSTR-2B is an important source of information, but legal ITC eligibility can depend on other GST provisions as well.

Ignoring Purchase Register-Only Invoices

Invoices missing from GSTR-2B should be tracked and investigated.

Treating Every Difference as a Supplier Error

Some differences originate in the business's own accounting records.

Not Tracking Credit Notes

Credit notes can change the amount of ITC available and should be reconciled with the original invoice.

Claiming Duplicate ITC

GSTN specifically advises taxpayers to ensure that ITC is not availed twice.

Failing to Maintain a Mismatch Tracker

Unresolved invoices can continue appearing month after month unless someone is responsible for following them up.

A Simple Monthly Reconciliation Tracker

A useful tracker can include:

This simple approach gives the finance team visibility over unresolved issues.

GST Reconciliation for Businesses in Delhi NCR

Businesses operating in Delhi, Noida, Gurugram, Ghaziabad and Faridabad may have suppliers located across several states.

This makes invoice-level reconciliation particularly important for:

• Inter-state purchases
• IGST transactions
• Multiple GST registrations
• E-commerce purchases
• Professional services
• Software subscriptions
• Imported goods
• Credit/debit notes
• Large vendor networks

Businesses searching for GSTR-2B reconciliation services in Delhi, GST reconciliation services in Noida, GST consultant in Gurugram, or ITC reconciliation services in Delhi NCR should look for a process that connects accounting records, supplier data and GST returns.

How Professional GST Reconciliation Helps ?

A structured GST reconciliation process can help businesses:

• Match invoices systematically.
• Identify missing supplier filings.
• Detect duplicate entries.
• Track credit and debit notes.
• Identify GSTIN errors.
• Separate timing differences from genuine mismatches.
• Review ITC eligibility.
• Reconcile GSTR-2B with GSTR-3B.
• Maintain an audit trail.
• Track unresolved supplier issues.

For businesses with high transaction volumes, spreadsheet-based reconciliation may become difficult to maintain. Accounting software, ERP systems and GST reconciliation tools can make the matching process more systematic.

However, technology should support—not replace—professional review.

Final Thoughts

GSTR-2B and the purchase register answer two different questions.

The purchase register tells you what your business has recorded.

GSTR-2B tells you what relevant supplier and other data has been reported into the GST system for the statement.

Neither should be viewed in isolation.

The correct process is to compare the two, investigate differences, determine ITC eligibility and then report the appropriate amount in GSTR-3B.

A strong monthly reconciliation process can turn GST compliance from a last-minute filing exercise into a controlled financial process.

The practical sequence is:

Download → Match → Investigate → Determine eligibility → Reconcile → File → Track unresolved differences.

Businesses should ideally complete this process every month rather than waiting for a GST notice or year-end reconciliation.

Need Help With GSTR-2B Reconciliation?

FilingSuvidha provides GST return filing, ITC reconciliation, accounting, taxation and ongoing GST compliance support for businesses.

Website: FilingSuvidha
Phone: +91-9625995981
Email: info@filingsuvidha.com

Our focus is on transparent pricing and on-time delivery.

Disclaimer

This article is intended for general informational purposes only and should not be considered legal, tax or professional advice. GST provisions, ITC conditions, portal functionality and filing procedures may change. Businesses should verify the applicable provisions and obtain professional advice based on their specific transactions and circumstances.